I'm a big fan of museum and attraction memberships as gifts. Then you have fun together while experiencing something new. Frisco Kids has a list of most Bay Area museums on the right side of the blog. Like going to amusement parks or the boardwalk? Either buy a season pass, get a gift certificate or just make your own, so you can go together.

As a gift for your spouse or better half, get a gift through Howaboutwe for couples. Unfortunately you do have to sign up to see the offerings, but you can choose experiences (shows, tours, massages, meals, etc.)